- IM7 (See other available formats)
- Regulatory Status
- Other Names
- Hermes, Pgp-1, H-CAM, HUTCH-1, ECMR III, gp85, Ly-24
- Rat IgG2b, κ
- Ave. Rating
- Submit a Review
- Product Citations
CD44 is a 80-95 kD glycoprotein also known as Hermes, Pgp1, H-CAM, or HUTCH. It is expressed on all leukocytes, endothelial cells, hepatocytes, and mesenchymal cells. As B and T cells become activated or progress to the memory stage, CD44 expression increases from low or mid levels to high levels. Thus, CD44 has been reported to be a valuable marker for memory cell subsets. High CD44 expression on Treg cells has been associated with potent suppressive function via high production of IL-10. CD44 is an adhesion molecule involved in leukocyte attachment to and rolling on endothelial cells, homing to peripheral lymphoid organs and to the sites of inflammation, and leukocyte aggregation.Product Details
- Mouse, Human, Cross-Reactivity: Chimpanzee, Baboon, Cynomolgus, Rhesus, Squirrel Monkey, Horse (Equine), Cattle (Bovine, Cow), Swine (Pig, Porcine), Dog (Canine), Cat (Feline)
- Antibody Type
- Host Species
- Dexamethasone-induced myeloid leukemia M1 cells
- 0.2 µm filtered in phosphate-buffered solution, pH 7.2, containing no preservative. Endotoxin level is <0.01 EU/µg of the protein (<0.001 ng/µg of the protein) as determined by the LAL test.
- The Ultra-LEAF™ (Low Endotoxin, Azide-Free) antibody was purified by affinity chromatography.
- The antibody is bottled at the concentration indicated on the vial, typically between 2 mg/mL and 3 mg/mL. Older lots may have also been bottled at 1 mg/mL. Please contact technical support for concentration and total µg amount, or use our Lookup tool if you have a lot number.
- Storage & Handling
- The antibody solution should be stored undiluted between 2°C and 8°C. This Ultra-LEAF™ solution contains no preservative; handle under aseptic conditions.
FC - Quality tested
CyTOF® - Verified
ELISA, IHC, IP, CMCD, Stim - Reported in the literature, not verified in house
- Recommended Usage
Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is ≤0.25 µg per million cells in 100 µl volume or 100 µl of whole blood. It is recommended that the reagent be titrated for optimal performance for each application.
- Application Notes
Clone IM7 has been reported to recognize an epitope common to alloantigens and all isoforms of CD4417,18 that is located between amino acids 145 and 18620. This clone has been verified for immunocytochemistry (ICC) and frozen immunohistochemistry (IHC-F). Additional reported applications (for the relevant formats) include: immunohistochemistry of acetone-fixed frozen sections and formalin-fixed paraffin-embedded sections6,7, complement-mediated cytotoxicity1, immunoprecipitation1,3, and in vivo inhibition of DTH4,5. The Ultra-LEAF™ purified antibody (Endotoxin < 0.01 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays (Cat. No. 103046, 103065 - 103069).
Cross-reactivity to ferret has been reported by a collaborator, but not verified in house.
(PubMed link indicates BioLegend citation)
- Trowbridge IS, et al. 1982. Immunogenetics 15:299. (ICFC, IP, CMCD)
- Katoh S, et al. 1994. J. Immunol. 153:3440. (ELISA)
- Budd RC, et al. 1987. J. Immunol. 138:3120. (IP)
- Camp RL, et al. 1993. J. Exp. Med. 178:497. (Block)
- Weiss JM, et al. 1997. J. Cell Biol. 137:1137. (Block)
- Frank NY, et al. 2005. Cancer Res. 65:4320. (IHC) PubMed
- Cuff CA, et al. 2001. J. Clin. Invest. 108:1031. (IHC)
- Lee JW, et al. 2006. Nature Immunol. 8:181.
- Zhang N, et al. 2005. J. Immunol. 174:6967. PubMed
- Huabiao C, et al. 2005. J. Immunol. 175:591. PubMed
- Gui J, et al. 2007. Int. Immunol. 19:1201. PubMed
- Wang XY, et al. 2008. Blood 111:2436. PubMed
- Kenna TJ, et al. 2008. Blood 111:2091. PubMed
- Yamazaki J, et al. 2009. Blood PubMed
- Kmieciak M, et al. 2009. J. Transl. Med. 7:89. (FC) PubMed
- Chen YW, et al. 2010. Mol. Cancer Ther. 9:2879. PubMed
- Zheng Z, et al. 1995. J. Cell. Biol. 130:485.
- Wiranowska M, et al. 2010. Int. J. Cancer 127:532.
- Hirokawa Y, et al. 2014. Am J Physiol Gastrointerest Liver Physiol. 306:547. PubMed
- Sandmaier BM, et al. 1998. Blood 91:3494.
- Yang Y, et al. 2015. Hypertension. 65:1047. PubMed
- Peterson VM, et al. 2017. Nat. Biotechnol. 35:936. (PG)
AB_2832294 (BioLegend Cat. No. 103065)
AB_2561491 (BioLegend Cat. No. 103046)
AB_2832295 (BioLegend Cat. No. 103066)
AB_2832296 (BioLegend Cat. No. 103067)
AB_2832297 (BioLegend Cat. No. 103068)
AB_2832298 (BioLegend Cat. No. 103069)
- Variable splicing of CD44 gene generates many CD44 isoforms, 80-95 kD
All leukocytes, epithelial cells, endothelial cells, hepatocytes, mesenchymal cells
- Leukocyte attachment and rolling on endothelial cells, stromal cells and ECM
- Hyaluronan, MIP-1β, fibronectin, collagen
- Cell Type
- B cells, Endothelial cells, Epithelial cells, Leukocytes, Mesenchymal cells, Mesenchymal Stem Cells, Tregs
- Biology Area
- Cell Adhesion, Cell Biology, Immunology, Stem Cells
- Molecular Family
- Adhesion Molecules, CD Molecules
- Antigen References
1. Barclay AN, et al. 1997. The Leukocyte Antigen FactsBook Academic Press.
2. Haynes BF, et al. 1991. Cancer Cells 3:347.
3. Goldstein LA, et al. 1989. Cell 56:1063.
4. Mikecz K, et al. 1995. Nat. Med. 1:558.
5. Hegde V, et al. 2008. J. Leukocyte Biol. 84:134.
6. Liu T, et al. 2009. Biol. Direct 4:40.
- Gene ID
- 12505 View all products for this Gene ID 960 View all products for this Gene ID
- View information about CD44 on UniProt.org
- Do you guarantee that your antibodies are totally pathogen free?
BioLegend does not test for pathogens in-house aside from the GoInVivo™ product line. However, upon request, this can be tested on a custom basis with an outside, independent laboratory.
- Does BioLegend test each Ultra-LEAF™ antibody by functional assay?
No, BioLegend does not test Ultra-LEAF™ antibodies by functional assays unless otherwise indicated. Due to the possible complexities and variations of uses of biofunctional antibodies in different assays and because of the large product portfolio, BioLegend does not currently perform functional assays as a routine QC for the antibodies. However, we do provide references in which the antibodies were used for functional assays and we do perform QC to verify the specificity and quality of the antibody based on our strict specification criteria.
- Does BioLegend test each Ultra-LEAF™ antibody for potential pathogens?
No, BioLegend does not test for pathogens in-house unless otherwise indicated. However, we can recommend an outside vendor to perform this testing as needed.
- Have you tested this Ultra-LEAF™ antibody for in vivo or in vitro applications?
We don't test our antibodies for in vivo or in vitro applications unless otherwise indicated. Depending on the product, the TDS may describe literature supporting usage of a particular product for bioassay. It may be best to further consult the literature to find clone specific information.
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